【修改】执行voc预测时每次都需要加载COCO解析文件异常

[pstruggle]

问题描述 Please describe your issue 从快速入门开始的，训练完成，在进行预测时： python tools/infer.py -c configs/yolov3/yolov3_mobilenet_v1_roadsign.yml -o use_gpu=true --infer_img=demo/road554.png ；有报错：

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